<template>

  <el-container class="home-container">
    <!-- 头部区域 -->
  <el-header>
    <div>
      <img src="../assets/heima.png" alt="">
      <span>电商后台管理系统</span>
    </div>
    <el-button type="info" @click="logout">退出</el-button></el-header>
     <!-- 页面主体区域 -->
  <el-container>
    <!-- 侧边栏 -->
    <el-aside  :width="isCollapse ? '64px' : '200px'">
      <div class="toggle-button" @click="toggleCollapse">|||</div>
      <!-- 导航栏区域 -->
    <el-menu
      background-color="#545c64"
      text-color="#fff"
      active-text-color="#409FFF"
      unique-opened
         :collapse="isCollapse"
         :collapse-transition="false"
         router
         @open="handleOpen"
         :default-active="activePath">
       <!--一级菜单  -->
      <el-submenu :index="item.id+''" v-for="item in menulist" :key="item.id" >
        <!--一级菜单的模板区域  -->
        <template slot="title">
          <i :class="iconsObj[item.id]"></i>
          <span>{{item.psname}}</span>
        </template>
         <!-- 二级菜单 -->
        <el-menu-item :index="'/'+subItem.pspath" v-for="subItem in item.children" 
        :key="subItem.id" @click="saveNavState('/'+subItem.pspath)">
          <template slot="title">
             <i :class="iconsObj[item.id]"></i>
             <span>{{subItem.psname}}</span>
          </template>
        </el-menu-item>
      </el-submenu>
     
    </el-menu>
      
    </el-aside>
    <!-- 右侧内容主体 -->
    <el-main>
     <!-- 路由占位符 -->
    <router-view></router-view>
    </el-main>
  </el-container>
</el-container>

</template>
   
<script>
  export default{
       //钩子函数(在模板被渲染是调用)
      created(){
         this.getMenuList()
         this.activePath = window.sessionStorage.getItem("activePath")
      },
      data(){
         return{
        //左侧菜单数据
         menulist:[],
         iconsObj:{
           '125':'iconfont icon-user',
           '103':'iconfont icon-tijikongjian',
           '101':'iconfont icon-shangpin',
           '102':'iconfont icon-danju',
           '145':'iconfont icon-baobiao'
         },
         //折叠属性
         isCollapse:false,
         //被激活的链接
         activePath:''
         }
        },

      methods:{
           logout()
          {
             window.sessionStorage.clear();
              this.$router.push("/login");
          },
       //获取所有的菜单
   async getMenuList()
       {
        
     const {data:res} = await this.$http.get("/server/menu",
     
     );
       if(res.meta.status!=200) return this.$message.error(res.meta.msg)
     
       this.menulist=res.data
    
      },
      //按钮，切换菜单的折叠与展开
      toggleCollapse()
      {
        this.isCollapse=!this.isCollapse;
      },
      // 保存链接的激活状态
      saveNavState(activePath)
      {
        window.sessionStorage.setItem("activePath",activePath)
        this.activePath=activePath
      },
      //菜单的单独打开
      handleOpen()
      {

      }
    }
  };
</script>

<style lang="less" scoped>
 .home-container{
     height: 100%;  
 } 
  .el-header{
    background-color: #373d41;
    display: flex;
    justify-content: space-between;
    padding-left: 0;
    align-items: center;
    color: #fff;
    font-size: 20px;
    > div{
      display: flex;
      align-items: center;
    }
    span{
      margin-left: 15px;
    }
  }

  .el-aside{
    background-color: #333744;
    .el-menu{
      border-right: none;
    }
  }

  .el-main{
    background-color: #eaedf1;
  }
 .toggle-button{
     background-color: #4a5064;
     font-size: 10px;
     line-height: 24px;
     color: #fff;
     text-align: center;
     letter-spacing: 0.2em;
     cursor: pointer;

 }    

</style>